Interstate standard GOST 30515-2013

"CEMENTS. GENERAL TECHNICAL CONDITIONS"

(put into effect by order Federal agency on technical regulation and metrology dated June 11, 2014 N 654-st)

Cements. General specifications

Preface

The goals, basic principles and basic procedure for work on interstate standardization are established by GOST 1.0-92 "Interstate standardization system. Basic provisions" and GOST 1.2-2009 "Interstate standardization system. Interstate standards, rules and recommendations for interstate standardization. Rules for development, adoption, application , updates and cancellations"

1 area of ​​use

This standard applies to all types of cements and establishes:

Terms with corresponding definitions;

Classification;

Are common technical requirements;

Safety requirements;

Sampling requirements for cement quality control;

Acceptance rules;

Eligibility criteria;

Rules for assessing the compliance of cement quality with the requirements of regulatory documents for specific types of cements;

Test methods;

Requirements for transportation and storage;

Manufacturer's warranty.

2 Normative references

This standard uses Normative references to the following interstate standards:

GOST 8.579-2002 State system ensuring uniformity of measurements. Requirements for the quantity of packaged goods in packages of any type during their production, packaging, sale and import

GOST 1581-96 Portland backfill cements. Specifications

GOST 2226-2013 Bags made of paper and combined materials. Are common technical specifications

GOST 4013-82 Gypsum and gypsum anhydrite stone for the production of binding materials. Specifications

GOST 5382-91 Cements and materials for cement production. Chemical analysis methods

GOST ISO 9001-2011 Quality management systems. Requirements

GOST 9078-84 Flat pallets. General technical conditions

GOST 14192-96 Marking of cargo

GOST 15467-79 Product quality management. Basic concepts. Terms and Definitions

GOST 15895-77* Statistical methods of quality management. Terms and Definitions

GOST 16504-81 System of state testing of products. Testing and quality control of products. Basic terms and definitions

GOST ISO/IEC 17025-2009 General requirements to the competence of testing and calibration laboratories

GOST 25951-83 Polyethylene shrink film. Specifications

GOST 30108-94 Construction materials and products. Determination of specific effective activity of natural radionuclides

GOST 30744-2001 Cements. Test methods using polyfraction sand

GOST 31108-2003 General construction cements. Specifications

NOTE When using this standard, it is advisable to check the validity of the referenced standards in information system common use- on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or according to the annual information index "National Standards", which was published as of January 1 of the current year, and according to the releases of the monthly information index "National Standards" for this year. If the reference standard is replaced (changed), then when using this standard you should be guided by the replacing (changed) standard. If the reference standard is canceled without replacement, then the provision in which a reference is made to it is applied in the part that does not affect this reference.

3 Terms and definitions

Terms that should be used in regulatory documents, technical and technological documentation for cements, and their definitions are given in Appendix A.

4 Classification

4.1 Cements are classified according to the following main characteristics:

By purpose;

Type of clinker;

Material composition;

Compressive strength;

Hardening speed;

Setting time.

4.2 According to their intended purpose, cements are divided into:

For general construction;

Special.

4.3 Based on the type of clinker, cements are divided into those made on the basis of:

Portland cement clinker;

Aluminous (high alumina) clinker;

Mixtures of Portland cement and sulfoaluminate (sulfoferrite) clinker.

4.4 Based on their material composition, cements based on Portland cement clinker are divided into types characterized by different types and contents of mineral additives:

Type I - Portland cement containing only Portland cement clinker as the main component of the material composition;

Type II/A - Portland cement with mineral additives, containing as the main components Portland cement clinker and a mineral additive or a mixture of mineral additives in an amount from 6% to 20%;

Type II/B - Portland cement with mineral additives, containing Portland cement clinker and slag as the main components in an amount from 21% to 35%;

Type III - Portland slag cement containing as the main components Portland cement clinker and granulated blast furnace, electrothermophosphorus or fuel slag in an amount from 36% to 65%;

Type IV - pozzolanic cement containing Portland cement clinker and pozzolana as the main components in an amount from 21% to 35%;

Type V is a composite cement containing as the main components Portland cement clinker and a mixture of slag and pozzolana and/or fly ash in an amount from 22% to 60%.

The values ​​of the permissible content of mineral additives in cement refer to the sum of the main and auxiliary components of cement (except for gypsum stone or other materials containing mainly calcium sulfate), taken as 100%.

Note - When determining the additive content, the result is rounded to the nearest whole number**;

Type I-C - sulfated Portland cement, containing Portland cement clinker as the main component, and sulfoaluminate (sulfoferrite) clinker as an auxiliary component in an amount of not more than 5%;

Type II-C sulfated Portland cement, containing as the main components Portland cement clinker, sulfoaluminate (sulfoferrite) clinker in an amount from 6% to 20%.

The name and content of mineral additives in cement and types of cement can be further clarified in regulatory documents for specific types of cement or a group of specific products.

4.5 Based on compressive strength, cements are divided into classes: 22.5; 32.5; 42.5; 52.5. Regulatory documents for specific types of cement may establish additional strength classes or restrictions on the classes used. For some special types of cements, taking into account their purpose, it is allowed to set only one strength class or set strength values ​​that differ from those indicated above.

4.6 Based on the hardening speed, general construction cements are divided into strength subclasses:

Normally hardening (N) with normalization of strength at the age of 2 (7) and 28 days;

Rapid-hardening (B) with normalized strength at the age of 2 days, increased compared to normal hardening, and 28 days;

Slow-hardening (M) with normalized initial strength at the age of 7 (2) days, lower than normal-hardening cements, and 28 days.

4.7 According to the setting time, cements are divided into:

For slow-setting - with a standardized period of onset of setting of more than 2 hours;

Normally setting - with a standardized start time of setting from 45 minutes to 2 hours;

Quick-setting - with a standardized start time of less than 45 minutes.

4.8 The classification of special cements by purpose is established in the regulatory documents for these cements.

4.9 The classification by purpose of special cements is established in the regulatory documents for these cements.

4.10 It is recommended to include recommendations on rational areas of use of cements in regulatory documents for specific types of cements or a group of specific products.

INTERSTATE COUNCIL FOR STANDARDIZATION OF METROLOGY AND CERTIFICATION

INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION

INTERSTATE GOST

STANDARD 30515-2013

General technical conditions

Official publication

(EN 197-1:2011, NEQ) (EN 197-2:2000, NEQ)

Moscow Standardfor m 2014

Preface

The goals, basic principles and basic procedure for work on interstate standardization are established by GOST 1.0-92 “Interstate standardization system Basic provisions” and GOST 1.2-2009 “Interstate standardization system Interstate standards, rules and recommendations for interstate standardization Rules for the development, adoption, application, updating and cancellations"

Standard information

1 DEVELOPED by LLC Firm "CEMISKON"

2 INTRODUCED by the Technical Committee for Standardization TC 465 “Construction”

3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (Protocol No. 63-P of December 27, 2013)

4 This standard is in accordance with the following European regional standards EN 197-1:2011 Cement - Part 1: Composition, specification and conforming criteria for common cements, EN 197-2: 2011 Cement - Part 2: Confo unity evaluation (Cement. Part 2: Confirmation of conformity) regarding the classification of cements, test methods, quality assessment rules, criteria for compliance of cement quality with regulatory requirements.

Transfer from in English(ate).

Level of conformity - nonequivalent (NEQ)

5 Order of the Federal Agency for Technical Regulation and Metrology dated June 11, 2014 No. 654-st, the interstate standard GOST 30515-2013 was put into effect as a national standard Russian Federation from January 1, 2015

Information about changes to this standard is published in the annual information index “National Standards” and the text of changes and adjustments is published in the monthly information decree “National Standards”. In case of revision (replacement) or cancellation of this standard, the corresponding notice will be included in the monthly information index “National Standards”. Appropriate infrastructure. notifications and texts are also posted in the public information system - on the official information system of the Federal Agency for Technical Regulation and Metrology on the Internet

F Standardfork; 2014 In the Russian Federation, this standard cannot be reproduced in whole or in part, replicated and distributed as an official publication without permission from the Federal Agency for Technical Regulation and Metrology

GOST 30515-2013

1 area of ​​use.............................................. ...................................

2 Regulatory powders.................................................... ......................................

3 Terkins and definitions.................................................... ...................................

4 Classification................................................... ........................................................

5 General technical requirements.................................................. .............

5.1 Characteristics................................................... .......................................

5.2 Requirements for materials.................................................... ......................

5.3 Packaging................................................... ........................................................

5.4 Marking................................................... ...........................................

6 Safety requirements................................................................... ...............................

7 Sampling......................................................... ........................................................

7.1 General provisions...................................................................................

7.3 Checking the homogeneity of the pooled (laboratory) sample

7.4 Sample collection and preparation procedure.................................................... .......

7.5 Packaging, labeling and storage of samples....................................................

7.6 Sampling report.................................................... ...........................................

8 Acceptance rules......................................................... ...................................

8 1 General provisions................................................... ....................................

8.2 Acceptance................................................... ........................................................ .

8 3 Assessing the level of quality a................................................... ...............................

8.4 Quality control of cement by consumers and supervisory authorities

S 5 Confirmation of conformity.................................................... ...............

9 Methods of ingestion.................................................... ...........................................

10 Transportation and storage.................................................... ....................

10.1 Transportation................................................... ...............................

10.2 Storage................................................... ...................................................

11 Confirmation of compliance with safety requirements....................................

12 Manufacturer's warranty.................................................... ...................................

Appendix A (mandatory) Terms and definitions Appendix B (mandatory) Form of the manufacturer's sampling report

GOST 30515-3013

Appendix B (mandatory) Form of the sampling report in any organization,

except the manufacturer................................................... ......................

Appendix D (mandatory) Reception of cement in a stream.................................................

Appendix E (recommended) Acceptance and delivery journal form.................................................... ...................................

tion when receiving in a stream................................................... ...............

Appendix I (mandatory) Assessment of the quality level of cement by variables.................................................... ...................................

Appendix K (mandatory) Assessment of representativeness and accuracy of cement testing at the enterprise.................................................... .............

INTERSTATE STANDARD

CEMENTS General technical conditions

Cements. General specifications

Date of introduction - 2015-01-01

1 area of ​​use

This standard applies to all types of cements and establishes:

Terms with corresponding definitions,

Classification,

General technical requirements,

Safety requirements,

Sampling requirements for cement quality control,

Acceptance rules;

Compliance criteria

Rules for assessing the compliance of cement quality with the requirements of regulatory documents for specific types of cements,

Test methods;

Requirements for transportation and storage,

Manufacturer's warranty.

This standard uses normative references to the following interstate standards:

GOST 8.579-2002 State system for ensuring the uniformity of measurements. Requirements for the quantity of packaged goods in packages of any type during their production, packaging, sale and import

GOST 1581-96 Portland grouting agents. Specifications

Official publication

GOST 30515-2013

GOST 2226-2013 Bags made of paper and combined materials. General technical conditions

GOST 4013-82 Gypsum and gypsum anhydrite stone for the production of binding materials. Specifications

GOST 5382-91 Cements and materials for cement production. Chemical analysis methods

GOST ISO 9001-2011 Quality management systems Requirements GOST 9078-84 Flat pallets. General technical conditions GOST 14192-96 Marking of cargo

GOST 15467-79 Product quality management Basic concepts Terms and definitions

GOST 15895-77* Statistical methods of quality management Terms and definitions

GOST 16504-81 System of state testing of products. Testing and quality control of products. Basic terms and definitions

GOST ISO/IEC 17025-2009 General requirements for the competence of testing and calibration laboratories

GOST 25951-83 Polyethylene shrink film Technical specifications

GOST 30108-94 Construction materials and products. Determination of the specific effective activity of natural radionuclides

GOST 30744-2001 Cements. Test methods using polyfractional sand

GOST 31108-2003 General construction cements Technical conditions

Note - When using this standard, it is advisable to check the validity of the reference standards in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet or using the annual information index "National Standards", which was published as of January 1 of the current year, and according to the releases of the monthly information index “National Standards” for the current year. If the reference standard is replaced (changed), then when using this standard the guidelines

15 The Russian Federation has GOST R 50779.10-2000, GOST R 50779.11-2000

GOST 30515-2013

be replaced by a replacing (amended) standard. If the reference standard is canceled without replacement, then the provision in which a reference is made to it is applied in the part that does not affect this reference.

3 Terms and definitions

Terms that should be used in regulatory documents, technical and technological documentation for cements, and their definitions are given in Appendix A.

4 Classification

4.1 Cements are classified according to the following main characteristics:

By appointment,

Type of clinker;

Material composition,

Compressive strength,

Hardening speed,

Setting time.

4.2 According to their intended purpose, cements are divided

For general construction,

Special.

4.3 Based on the type of clinker, cements are divided into those made on the basis of:

Portland cement clinker,

Aluminous (high alumina) clinker,

Mixtures of Portland cement and sulfoaluminate (sulfoferritic) clinker

4.4 Based on their material composition, cements based on Portland cement clinker are divided into types characterized by different types and contents of mineral additives:

GOST 30515-2013

Type I - Portland cement containing only Portland cement clinker as the main component of the material composition;

Type P/A - Portland cement with mineral additives, containing as the main components Portland cement clinker and a mineral additive or a mixture of mineral additives in an amount from 6% to 20%,

Type P/W - Portland cement with mineral additives, containing Portland cement clinker and slag as the main components in an amount from 21% to 35%;

Type Ш - slag port cement, containing as the main components Portland cement clinker and granulated blast furnace, electro-thermophosphorus or fuel slag in an amount from 36% to 65%,

Type IV - pozzolanic cement containing Portland cement clinker and pozzolana as the main components in an amount from 21% to 35%,

Type V - composite cement containing as the main components Portland cement clinker and a mixture of slag and pozzolana and/or fly ash in an amount from 22% to 60%

The values ​​of the permissible content of mineral additives in cement refer to the sum of the main and auxiliary components of cement (except for gypsum stone or other materials containing mainly calcium sulfate), taken as 100%.

Note - When determining the additive content, the result is rounded to the nearest whole number*,

Type 1-C - sulfated Portland cement, containing Portland cement clinker as the main component, and sulfoaluminate (sulfoferritic) clinker in an amount of no more than 5% as an auxiliary component,

* In the Russian Federation, the content of the additive is determined according to GOST R 51795-2001.

GOST 30515-2013

Type P-S sulfated Portland cement, containing as the main components Portland cement clinker, sulfoaluminate (sulfoferrite) clinker in an amount from 6% to 20%

The name and content of mineral additives in cement and types of cements can be further clarified in regulatory documents for specific types of cements or a group of specific products

4.5 Based on compressive strength, cements are divided into classes: 22.5; 32.5; 42.5; 52.5. Regulatory documents for specific types of cement may establish additional strength classes or restrictions on the classes used. For some special types of cements, taking into account their purpose, it is allowed to set only one strength class or set strength values ​​that differ from those indicated above.

4.6 Based on the hardening speed, general construction cements are divided into strength subclasses:

Normally hardening (N) with normalization of strength at the age of 2 (7) and 28 days,

Rapid-hardening (B) with normalized strength at the age of 2 days, increased compared to normal flax-hardening, and 28 days;

Slow-hardening (M) with normalized initial strength at the age of 7 (2) days, lower than normal-hardening cements, and 28 days.

4.7 According to the setting time, cements are divided into:

For slow-setting - with a standardized start time of more than 2 hours,

Normally setting - with a standardized start time of setting from 45 minutes to 2 hours,

Fast setting - with a standardized start time for setting

less than 45 min.

GOST 30515 - 3013

4.8 The classification of special cements by purpose is established in the regulatory documents for these cements.

4.9 Classification by purpose of special cements is established in regulatory documents for these cements

4.10 It is recommended that regulatory documents for specific types of cements or a group of specific products include recommendations on rational areas of use of cements

5 General technical requirements

Cements must comply with the requirements of this standard and regulatory documents for specific types of cements or a group of specific products and be manufactured according to technological documentation approved by the manufacturer

5.1 Characteristics

5.1.1 Quality indicators established in regulatory documents for specific types of cements are divided into mandatory and recommended.

5.1.2 The nomenclature of mandatory quality indicators used in regulatory documents for specific types of cements is given in Table 1.

Table 1 - Nomenclature of mandatory quality indicators

GOST 30515-2013

End of table 1

5.1.3 Quality indicators, end of setting, specific surface area (grinding fineness), mobility of cement-sand mortar, spreadability of cement paste, hydrophobicity, content of free calcium oxide, alkali oxides, insoluble residue in clinker, weight loss during ignition in cement are recommended for inclusion in regulatory documents for specific types of cements. If these indicators are included in the relevant regulatory document, they become mandatory when applying it

5.1.4 Standardized values ​​of mandatory and recommended quality indicators are established in regulatory documents for specific types of cements or a group of specific products, depending on their purpose, taking into account the requirements of this standard.

GOST 30515-2013

5.2 Material requirements

For the production of cements the following are used:

Clinker manufactured in accordance with the requirements of the manufacturer's technological regulations. Clinker of standardized mineralogical composition, as well as with standards for chemical composition used in cases where this is provided for by regulatory documents for special cements,

Gypsum stone according to GOST 4013. It is allowed to use other materials containing mainly calcium sulfate, in accordance with the relevant regulatory documents,

Mineral additives as a main or auxiliary component of cement according to relevant regulatory documents,

Technological and special additives that regulate the basic properties of cement, according to the relevant regulatory documents

Additives must not impair the properties of cement or concrete and mortar made on its basis.

Note - At the request of the consumer, plasticizing additives should not be added to the cement if they are strictly combined with the super-hyperplasticizers used by the consumer. The latter must be specified in the agreement (contract).

5.3 Packaging

5 3.1 Cement is shipped with or without packaging.

5.3.2 For cement packaging the following is used:

Five- or six-layer paper bags in accordance with GOST 2226 or paper bags of any layer in accordance with the relevant regulatory or technical documents, the quality indicators of which are not lower than the requirements established by GOST 2226;

Soft containers with airtight liner or other

GOST 30515-2013

packaging that reliably protects cement from moisture and contamination, as well as from the effects of ESO and air moisture, in accordance with relevant regulatory documents

For small packaging, polyethylene cans, bags, and other packaging that ensures the safety of cement are used, in accordance with the relevant regulatory documents

5.3.3 The nominal net weight of a bag of cement should not be more than 50 kg, the capacity of a flexible container should not exceed 2 tons.

The deviation of the average net weight of cement downwards should not exceed the limit values ​​​​established by GOST 8.579.

5.3.4 The average gross weight of a bag of cement is determined by weighing 20 bags selected at random from the batch and dividing the result by 20

The average weight of a bag is determined by weighing 20 bags selected at random from a batch of bags received and dividing the result by 20.

The average net weight of cement in a bag is determined by subtracting the average weight of the bag from the average gross weight of a bag of cement.

The deviation of the average net weight of cement in bags in a batch from the net weight indicated on the packaging should not be more than + 1.0; - 0.4%

5.3.5 The average net weight of cement in a soft container is determined by subtracting from the gross weight of a soft container with cement the average weight of a soft container, determined similarly to the average weight of a paper bag.

The deviation of the average net weight of cement in a soft container from that indicated on the packaging should not be more than + 2.0; - 0.5%.

5.3.6 The net weight of cement in a separate package for small packaging should be [(3; 5) ± 0.05] kg, [(10; 20, 25) ± 0.3] kg.

GOST 30515-2013

5.4 Marking

5.4.1 Marking must be clear and contain:

Manufacturer's name and trademark,

Mark of circulation on the market, if provided for by the legislation of the country of manufacture and (or) importer of cement,

Symbol cement and (or) its full name in accordance with normative document;

Designation of the regulatory document in accordance with which cement is manufactured and supplied,

The average net weight of cement in a package or the net weight of cement in a vehicle,

Mark of conformity for the supply of certified cement (if provided for by the certification system).

5.4.2 When packing cement in bags, markings are applied to each bag in any part of it. When packing cement in soft containers, the marking is applied to a label inserted into a special pocket on the soft container. It is allowed to apply markings with indelible paint on the side surface of a soft container

5.4.3 For small packaging of cement, the marking is applied to a label, which is pasted onto the packaging or applied directly to the packaging, or placed between the outer and internal layers of the packaging (if the outer layer of the packaging is transparent). Each package of cement must have brief instructions on its use, which can be applied to the packaging or attached to it.

5.4.4 When supplying colored cement, a stripe of the appropriate color must be applied to the packaging and label

5.4.5 When delivering cement in small packages placed in larger containers, the label is also affixed to the container. In this case, the label additionally indicates the number of packages in the container.

GOST 30515-2013

5.4.6 When forming transport packages from bags of cement, the top row of bags must be laid so that the markings on the bags are clearly visible. For packages top row Additionally, transport markings are applied in accordance with GOST 14192.

5.4.7 Each vehicle is provided with a label indicating all the information in 5.4.1 and additionally the cement batch number and the date of its shipment.

The label is attached to the vehicle in an accessible place in any way that ensures its safety during transportation and ease of reading, and when delivering cement by road, it is included in the shipping documentation handed over to the accompanying person or driver.

6 Safety requirements

6.1 The specific effective activity of natural radionuclides Af* in cement should not be more than 370 Bq/kg, and in materials used for the production of cement, for example, in mineral additives - no more than 740 Bq/kg.

6.2 The standards for specific types of cements must also indicate safety requirements confirming the product’s compliance with the technical regulations in force in the country, as well as the legislation of the country of manufacture and (or) consumer of the cement.

6.3 It is not allowed to introduce auxiliary components, technological and special additives into cement that increase the hazard class of cement

7 Sampling

7.1 General provisions

7.1.1 Sampling for production control is carried out in accordance with

in accordance with the manufacturer’s technological documentation

7.1.2 Sampling for cement quality control by a third party for inspection, certification and other types of tests is carried out only from the batch (part of the batch) accepted by the manufacturer’s technical control service

7.1.3 The test results of a sample taken in accordance with the requirements of this standard apply only to the batch (part of the batch) of cement from which the sample was taken. It is not allowed to extend the test results of a sample taken from part of a batch to other parts of the same batch.

7.1.4 To control the quality of manufactured cement, one combined sample is made from point samples taken from each controlled batch (part of the batch).

It is not allowed to compile a combined sample from cement from different batches.

7.2 Equipment for sampling, mixing and separating samples

7.2.1 To select and mix point samples and divide the combined sample into parts (laboratory samples), equipment and devices made of materials that do not react with cement are used.

The use of equipment and fixtures made of aluminum or galvanized materials is not allowed. The fixtures must be dry and clean.

If necessary, the equipment used and sampling locations should be agreed upon by the interested parties before sampling begins.

7.2.2 To take cement samples from containers, vehicles or packaging, the equipment and devices of any design used must ensure:

Sampling at a given depth of the cement layer or at a given location

packaging,

GOST 30515-2013

Protection of the selected sample from mixing with the cement of the overlying layers when it is removed from the container or packaging

7.2.3 To take cement samples from pipelines, samplers of any design used must provide:

Sampling in equal parts at regular intervals established by the technological documentation, or continuously throughout the entire period of pumping cement through the pipeline,

Sampling only in the place where flow uniformity across the cross-section is achieved.

It is not allowed to install samplers in places where pipelines are bent, as well as near places where material is discharged from aspiration devices and in front of such devices.

7.2.4 Any equipment or device, as well as procedures, to ensure homogeneity of cement in the pooled sample or parts thereof shall be used to mix individual samples and separate the pooled sample into parts.

7.3 Checking the homogeneity of the pooled (laboratory) sample

7.3.1 To check the homogeneity of the combined sample, cement samples weighing at least 100 g each are taken from each laboratory sample obtained by dividing the combined sample, or from different parts of the combined sample, in which the content of calcium, silicon and sulfur (VI) oxides is determined. A sample is considered homogeneous if the discrepancy between the results of chemical analysis of two samples does not exceed twice the maximum repeatability error according to GOST 5382 for each of the indicators being determined. If an unsatisfactory result is obtained for at least one indicator, the procedure for averaging the combined sample should be adjusted until a homogeneous sample is obtained.

GOST 30515-2013

7.3.2 Checking the homogeneity of cement along the pipeline cross-section is carried out once when choosing a location for installing the sampler, achieving uniformity of cement characteristics throughout the entire pipeline cross-section.

7.3.3 The manufacturer must check the homogeneity of the pooled or laboratory sample as necessary, but at least once a month. A record of checking the homogeneity of a combined sample of a batch of cement must be made in the acceptance test log or on electronic media, if the results of acceptance tests are stored on such media.

7.3.4 When taking samples for in-plant quality control, inspection, certification or other tests, testing for the homogeneity of cement in the samples is carried out only if required by one of the parties involved in sampling

7.4 Sample collection and preparation procedure

7.4.1 Selection of spot samples of cement packed in bags, soft containers or other containers, as well as from specialized vehicles when transporting cement without packaging, is carried out from at least five units of packages or vehicles selected at random

If the controlled mass of cement consists of five or fewer units of packaging or specialized vehicles, a spot sample of approximately the same mass is taken from each of them

7.4.2 From bags, soft containers or other containers, a sample is taken from a depth of at least 15 cm, but not more than 15 cm from the bottom of the container (container). If the container depth is less than 30 cm, samples are taken from the middle of the layer.

Sampling from specialized vehicles when transporting cement without packaging is carried out from the cement flow during its loading or unloading. It is allowed to take samples through the top hatch vehicle from a depth of at least 15 cm

GOST 30515-2013

7.4.3 When accepting a batch of cement in a stream and with production control Sampling is carried out from each cement mill operating in one silo during its filling at regular intervals established by the manufacturer's technological documentation, but not less than five times from each mill operating in a silo during its filling.

7.4.4 The mass of spot samples must be such that the mass of the combined sample made up of them is at least 20 kg when checking the quality of cement by the manufacturer, consumer and supervisory authorities and at least 30 kg when checking the quality of cement in case of claims by the consumer

7.4.5 To prepare a pooled sample, all spot samples taken from one batch (part of a batch) are combined and thoroughly mixed manually or mechanically

7.4.6 From the pooled sample prepared according to 7.4.5, laboratory samples weighing approximately 8 kg each are obtained in the quantities specified in 7.4.7 and 7.4.8.

Laboratory samples may be obtained using any type of sample divider.

7.4.7 When monitoring the quality of cement by the manufacturer, two laboratory samples are obtained from the combined sample: the first for testing in the manufacturer’s laboratory, the second for storage with him for a period of time. warranty period established by a regulatory document or a supply agreement (contract), in case it is necessary to conduct repeated tests.

7.4.8 When monitoring the quality of cement by the consumer or supervisory authorities, three laboratory samples are obtained from the combined sample. The first sample is sent to an accredited testing laboratory third party, the second remains with the consumer or manufacturer, the third is stored with the manufacturer for at least three months

When monitoring the quality of cement, in the event of a consumer filing a claim, three laboratory samples are obtained from the combined sample. First

GOST 30515-2013

the sample is sent to an accredited third party testing laboratory, the second and third - to the manufacturer and consumer.

7.4.9 Each laboratory sample obtained in accordance with 7.4.6 must be packaged in accordance with 7.5 and sent to the appropriate laboratory for testing within three working days, not counting the day of collection.

7.5 Packaging, labeling and storage of samples

7.5.1 Packaging and storage of samples must ensure the preservation of the properties of the controlled cement. The container in which the samples are packaged must be clean, dry, air- and moisture-tight and made of a material inert to cement

7.5.2 Samples intended for testing in a third party laboratory and remaining with the consumer or manufacturer are packaged in airtight containers, sealed or sealed. The container is marked with the following information:

Manufacturer's name,

Symbol of cement and (or) name in accordance with the regulatory document,

Date and place of sampling;

Batch number, date of manufacture.

7.6 Sampling report

7.6.1 When monitoring the quality of cement by the consumer, as well as for the purpose of conducting certification, control and other tests, sampling is drawn up in an act with the mandatory inclusion of information in accordance with Appendix B or C. In the case of sampling not from the manufacturer, he is notified in advance of possible participation in sampling

7.6.2 When monitoring the quality of cement, when a consumer makes a claim, a sampling report is drawn up in accordance with the procedure established by the

Today they produce more quantity various cement options. For each of them, its own standard has been developed, according to which it is possible to determine all of its specifications, composition, scope and test methods.

According to this standard, cement can be classified into types such as general construction and special.

General cements

Based on the type of clinker material used to obtain the material, cement is divided on the basis of:

• Portland cement clinker;
• aluminous clinker;
• sulfoaluminate clinker.

GOST 30515 2013 cement may contain the following components:

• chlorine ion not more than 0.1%;
• sulfur oxide (VI) not less than 1.0;
• gypsum – no more than 5%.

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Material testing methods involve the following steps:

Portland cement and Portland slag cement

This standard contains all the information about the properties of cement based on Portland cement clinker. 1017885 contains all the technical requirements for the production of the material, test methods, labeling, and transportation.

Cement 10178 85 can be classified according to its constituent components. In this case, the following are distinguished:

• Portland cement, which does not contain mineral additives;
• Portland cement with additives, their volume does not exceed 20%;
• slag Portland cement with the addition of fine slag, the content of which does not exceed 20%.

According to the compression studies, the cement was tested for 28 days.

As a result, we managed to obtain the following brands:

• Portland cement - 400, 500, 550 and 600;
• Portland slag cement – ​​300, 400 and 500;
• quick-hardening Portland cement – ​​400 and 500;
• quick-hardening Portland slag cement – ​​400.

The hardening process for cement 10178 85 occurs after 45 minutes, and final hardening occurs after 10 hours from the start of mixing.

Test methods are carried out according to the following plan:

General construction

To obtain such material, Portland cement clinker, mineral components, gypsum, and also materials containing calcium sulfate are used.

The finished product can be subjected to the following research methods:

Sulfate resistant

The presented material is used in the production of reinforced concrete and concrete structures that can withstand corrosion and aggressive environments.

When producing sulfate-resistant Portland cement with mineral components according to GOST 22266 94, a mixture of slag and pozzolana is used, but their volume should not exceed 20%. Plasticizers can be added to the material, which will add strength to the finished product. The setting process should occur within 45 minutes, but no later than 10 hours from the moment of mixing.

Control methods include:

1. Determination of physical and mechanical characteristics of the material is carried out according to 30744.
2. The chemical formula of cement is determined by 5382.

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30515 97 state standard

For such material, the following control methods are used:

Backfilling

This standard defines the main characteristics of oil well cements. At the manufacturing plant, tests are carried out for strength, spreadability, consistency, duration of hardening, and water separation.

To carry out the strength test, a mold with dimensions of 50x50x50 mm is used. Its edges should be clean and treated with a small amount of machine oil. But the base of the mold is treated with a temperature-resistant lubricant to make it airtight. But what is the bulk density of cement m400, you can find out

Cement GOST 26798.2 96 is sent into the prepared form and compacted using a tamping rod. After laying the first layer and thoroughly compacting it, apply the second layer and again subject it to the same tests. Remove unnecessary dough with a knife.

The form with the samples is covered with a metal plate, which is then attached to prevent water from getting inside. All products are sent by thermostat, preheated to a temperature of 60 degrees. The sample holding process lasts 7 hours and 15 minutes. When time has passed, the molds are taken out of the thermostat and labeled.

Aluminous

This material is presented in the form of finely ground high-alumina blast furnace slag and gypsum. When cement is tested for 28 days, it should change in volume evenly during the hardening process. Concrete and mortars obtained from this material are highly waterproof. But how much cement per 1 m3 of concrete m200 is needed will help you understand the information

To determine the strength of the finished product according to GOST 310-69, samples are sent to molds and for storage in a bath with a hydraulic seal. Then the forms are placed in water for a day. To determine the uniformity of volume changes, it is necessary to take sample cakes and send them to water for 27 days.

According to the established standard, technical requirements are determined that must be adhered to in the manufacture of aluminous materials. They are used in the production of quick-hardening and heat-resistant concrete and mortars.

Control methods involve the following:

1. Determination of physical and mechanical properties of the material is carried out according to GOST 30744.
2. The chemical formula of cement is determined according to GOST 5382.
3. To determine the specific effective activity of natural radionuclides in cement, GOST 30108 is used.

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The requirements established by the standard make it possible to determine the composition of cement, its strength characteristics, and the level of water resistance. This data is very important when preparing various solutions, used in the field of construction.

Enough is now being produced a large number of various types cement. They may differ in some of the additives included in the composition, but each type of cement base must comply with the approved quality.

In our country, this is GOST 30515 2013, which includes general conditions, as well as characteristic details and also the composition and scope of their application.

Quality standard

GOST 30513 2015 “Cements. General technical conditions" was approved at the end of December 2013. It was adopted by an interstate standardization body, which includes many countries of the former USSR.

In particular, national authorities not only of Russia, but also of Belarus, Armenia, Moldova, Tajikistan, Azerbaijan and other countries voted for the adoption of this document.

This quality standard was introduced instead of GOST 30515 97 “Cements. General technical conditions”, so it can be considered the most relevant regulation today.

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